Last Updated: 2011-01-24 23:53:11 UTC
by Adrien de Beaupre (Version: 1)
Cisco Security Advisory: Multiple Vulnerabilities in Cisco ASA 5500 Series Adaptive Security Appliances, impact is DoS.
Advisory ID: cisco-sa-20100804-asa
Cisco Security Advisory: Multiple Vulnerabilities in Cisco Firewall Services Module, impact is DoS.
Advisory ID: cisco-sa-20100804-fwsm
Last Updated: 2010-08-04 16:33:43 UTC
by Tom Liston (Version: 1)
Considering reporting an incident?
Have you just received an incident report?
My, oh my... what are you to do?
Since I am unquestionably the arbiter of all that is good and right on the highways and byways we lovingly call the Internet, I put together a handy little guide to help you through these trying times. Just think of me as the "Miss Manners" of Incident Handling. Only I don't wear a dress...
What *NOT* To Do When Reporting An Incident
- Cop a 'tude: Ok, I can certainly understand that you're feeling a little miffed 'bout the fact that someone took a whack at one of your machines, but really, in my experience, most (i.e. ~99%) of the time the responsible party is many steps removed from the people you'll be contacting-- so venting your spleen on the dude at the receiving end of your email or phone call is just bad form. Save that stuff for telemarketers. (Note: Yes, I understand that telemarketers are often good, wholesome, hardworking folks trying to make ends meet. I just don't care.) If you're all wound up and ready to take names and kick butt, then you're clearly an amateur at incident response. More than likely, that evil Eastern-block hacker with the slicked back hair and bad teeth that you're imagining kicking over your webserver is actually just an unpatched WinXP machine owned by someone's Great Aunt Margaret that got whacked by the latest version of SDBot. Keep the vent-plug locked down tight on your spleen... no one wants you gettin' Great Aunt Maggie all spleeny.
- Get All Litigious: This is a subgroup of #1. In this case, instead of questioning whether the 'leet hax0r's parents were married at the time of his/her conception, you whip out the big guns, 'splainin' that you'll rain down all manner o'lawsuits, IRS investigations, and Papal excommunication on the responsible party. Trust me, if the FBI was interested in investigating your incident, you wouldn't be writing about it in an email to abuse@. Doing this just makes you look silly. Stop it.
- Look Stupid: A good incident report tells a story: it tells exactly *what* happened and exactly *when* it happened. "Stop hacking me!" is not an incident report -- it's an exclamatory sentence that reeks of idiocy. Include IP addresses (and, if they resolve, machine names) in your report. Include port numbers. Include times (synchronized to something besides your best stab at clicking "Ok" while staring at Mickey's hands...). Include (or offer to provide) packet captures. You need to do the work so that the people on the receiving end of your report don't have to... or you'll be ignored. Notice: All of these things imply that *you* actually have a dang clue, have done your homework, and are monitoring your network at some sort of reasonable level. Wow. Who would have thought that you actually needed to know what you're talking about to report an incident?
- Plant Your Flag: The Internet sucks when it comes to attribution. WHOIS tells you little and is often wrong about what it *does* tell you, IP addresses rarely reverse resolve, abuse@ email often appears to black-hole, and most ISP support staff gave up caring when they realized that "I work in IT" isn't really the chick-magnet phrase they thought it would be. With those kinds of odds against you, you're not gonna win many of these... I know it's frustrating when you have someone dead-to-rights and they simply dismiss you, saying, "It's not us." Let it go. You've taken the time to try to warn someone about an incident, and sometimes, that's the very best you can do. Persistence isn't a virtue here, and if you cross the line and get abusive about an incident yourself, it can get you in really deep, really fast.
- Blame The Victim: Not everyone is as 'leet as you... nor are they as good looking, suave, sophisticated and debonair. (Very few of us are...) But, because you're also as intelligent as you are attractive, you know that you shouldn't look down on someone who got 0wned. It's bad karma, and as these things always happen, you'll undoubtedly be next. Offer help if the situation warrants it. Explain what they need to do if they seem clueless. But why am I telling you this? You're also kindhearted and generous to a fault. Aren't you?
- Give up: We've all been there-- you look at the stream of evil stuff constantly raining down on your network, and you despair. All I can say is "don't give up." You've reported incident after incident, and it appears to go nowhere. Trust me, I know. I run a honeypot system... I get attacked on purpose, and I've probably sent thousands of emails reporting incidents. It never fails: just when I get to the point where I'm feeling like I'm trying to sop up the ocean with a paper towel (and I'm ready to "throw in" said towel), someone will actually reply and say "thank you." They come in all kinds of ways: I had a guy call me back about an hour after I originally talked to him when he was... well... a bit rude. He explained that he was very suspicious when I initially called, but when he actually checked out what I had told him and found out that he *did* have an infected machine on his network, he just had to call back and say "thanks." Years ago, I actually got a very nice Harry and David gift basket from a company I contacted when they had a server compromised. While I wouldn't sit by the front door waiting for the UPS guy to bring you largess, trust me, someone out there does appreciate what you're doing.
What *NOT* To Do When Someone Reports An Incident
- Cop a 'tude: While I fully support you being skeptical/wary when someone calls you out of the blue to report an incident, "skeptical" and "rude" are two different things. If the person reporting an incident seems to be asking "intrusive" questions, feel free to say "I really don't feel comfortable answering that" and ask them politely to provide whatever information they can. If it's someone trying to scam you, well... you've been polite to a scammer... certainly not the end of the world. But if the incident turns out to be real, you're gonna feel really, REALLY bad if you were rude and demeaning to someone who was just trying to help you out. (And, if you don't feel bad, then you should seriously start looking around for your soul... 'cause it must've fallen out of you recently. Look over in the corner, behind the filing cabinet.)
- Get All Litigious: I once called up the "Superior Court" of an unnamed California county to report that their website had been whacked and was currently advertising both erectile dysfunction medications and "hot teens" (i.e. they had the sex and the drugs... all they needed was some rock n'roll...). After the normal shuffling back and forth to various people who assured me that this "issue" wasn't their responsibility, somehow I ended up being palmed off on some County attorney who proceeded to explain all of the legal hell he was going to rain down on me for "hacking" their website. My opinion of Mr. Lawyer wasn't improved by the fact that he was clearly in negative-clue territory in his understanding of how the Intertubes worked. I finally silenced him when he asked me "How could you possibly know that this existed on our site if you didn't do it?" by giving him a very simple string of text to type into the mythical oracle of all knowledge known as "Google." Don't even think of accusing someone who *contacts you* of being the bad guy. Doing this just makes you look silly. Stop it.
- Look Stupid: If I had a nickel for everyone who told me they couldn't be the source of an attack because they run a) a firewall or b) antivirus, I would have... well... a lot of nickels. (Probably not enough to buy me another nice Harry and David gift basket, but still... a lot of nickels.) Come on... antivirus? A firewall? Really? If you're in IT and you truly believe that the fact that you're running a firewall or AV has any bearing on whether one of your machines could be infected and attacking others on the 'Net, then I have a bridge for sale. Really. I do. It's very pretty. Trust me.
- Plant Your Flag: Liston's Law of 'Net Karma: If you're stupid enough that, without checking, you would actually tell someone that an attack couldn't possibly be sourcing from your network, then the attack *is* sourcing from your network. Don't get cocky, 'cause you never know. If someone tells you that you have an issue, ESPECIALLY if that someone provides you with detailed information, check it out -- do NOT just dismiss it. Look at it this way: if your network is reasonably well-monitored, its not going to take you *that* long to confirm or deny... if it does, well then, your network isn't as well-monitored as you thought, now is it? Someone out there in Internet-land took the time to tell you that they think your network may be spewing badness -- the very *least* you can do is to look at some logs.
- Play The Victim: You got 0wned. Something, somewhere went wrong. Man up (or "woman up," but that just sounds weird...) and take 0wnership of the 0wning. It happened. Learn a lesson, fix something, and move on. Yes, you are a victim, just don't act like one.
- Forget To Say "Thank You": What? When your momma 'splained about manners were you spending your time pickin' your nose? (If so, you should've picked a better one... have you seen that thing between your eyes? Eeeesh!) Someone just did something nice for you. You may not like the news, but they didn't write it; they just took the time to deliver it to you, and the least (the VERY least) you can do is acknowledge them for it. No one likes to learn that their network has been 0wned, but would you really rather NOT know? And for those of you in the "if-I-don't-acknowledge-it,-it-didn't-happen" camp, come on! (And yes, I know that this is actually POLICY in some organizations...) Remember: THEY KNOW! They told YOU! Do you really think that the mind on the other end of that email or phone call you received will fall prey to the Jedi mind game you THINK you're perpetrating by not responding? "Oh, I guess since they never replied, those 5000 SSH login attempts never really happened..." No! They're just sitting back and thinking that you're a pretty big jerk for not even acknowledging their effort to let you know 'bout the problems you have. Seriously folks, tell your corporate counsel to go play with their briefs and send out a "thank you"... you don't need to admit to anything: just say "thank you for telling about this issue, we're looking into it." A little common courtesy goes a long way, and for those of us in the trenches who actually take the time to let people know about these things, a "thank you" email is a lifeline. Harry and David gift baskets are nice too.
Tom Liston - Handler - SANS Internet Storm Center
Senior Security Analyst - InGuardians, Inc.
Director, InGuardians Labs
Chairman, SANS Virtualization and Cloud Computing Summit
My honeypot tweets: @netmenaces